Improvement in machines for turning irregular forms



B. H. CONNOR.

Machines for Turning Irregular Forms.

No.l58,629. Patentedlan.12,1875.

UNITED STATES PATENT OFFICE.

BENJAMIN II. CONNOR, OF CINCINNATI, OHIO.

IMPROVEMENT IN MACHINES FOR TURNING IRREGULAR FORMS.

Specification forming part of letters Patent No. 158,629, dattd January12,1875; application filed June 15, 1874.

To all whom it may concern:

Be it known that I, BENJAMIN Il'. CONNOR, of Cincinnati, county ofHamilton and State of Ohio, have invented an Improvement in Machines forTurning Irregular Forms and I do hereby declare that the following is afull, clear, and exact description of the same, refer ence being had tothe annexed drawing making a part of this specification.

Figure 1 is a side elevation. Fig. 2 is a front elevation. Fig. 3 is aside elevation,showing a modification of Fig. 1. Fig. 4 is a section ofthe revolving head and slide, when the latter is used underneath theformer. Figs. 5 and 6 represent the sectional cam.

Similar letters of reference indicate like parts.

The nature of my invention relates to a machine for cutting irregularforms, such as ellipses, ovals, rectangles having rounded corners, orhaving one side and their two opposite corners rounded, as well as otherirregular forms and figures. It consists mainly of a rotating shalthaving a head revolving horizontally, to which a slide carrying acuttingtoolis attached also, a simple device fhstencd to the head,communicating motion to said slide by means of a cam held to the frame.It further consists in making said cam in sections, which sections maybe readily interchanged with each other, thereby cutting a large varietyof forms with comparatively few parts; also, a device giving that partacted upon by the sectional cam a vertical recipro- Ci ting motion.

In construction my invention is as follows: A A is the frame, supportedon legs a a. The vertical shaft 15 rotates in journal-beariu gs O, andreceives motion from the horizontal shaft D, through bevel-gearing E,from crank F, or belt and pulley in its stead. The upper end of shaft Bis held tightly to its bearings by means of a screw, l1, and to thelower end of said shaft is bolted the revolving head G. This head hasupon one side a dovetailed flange, over which a slide, II, is fittedsnugly, the latter moving freely over the former. A slot, h, in theslide admits a tool post, h, which may be adjusted to or from the centerof motion, according to the size of the figure to be cut. A cum, I, tocut a regular elliptic form,

is seen in the drawing, Figs. 1 and 2, and is held to the frame by meansof screws (1 a. A rightangle lever is seen at J, vibrating in bearing j,which is bolted to the head Or. To the horizontal arm of said lever isjournaled a friction-roller,j which fits snugly in the groove of cam l.The vertical arm of the lever is slotted, as seen in Fig. 1, receiving apin, and fastened into slide II. This pin may be adjusted verticallyinthe slide, which, by being placed farthest from the fulcrum ot' thelever, gives the slide the greatest throw, and being placed nearest thefulcrum gives it theleast. This adjustment regulates the ellipticity ofthe form, as will be readily observed.

The work to be operated on is placed on the table K, which has a plungerfitting in the bore of the frame at A. The table is elevated or loweredby a hand-wheel, L, operating the, screw L and is kept from turning byset-screw M engaging with the plunger through a vertical groove cuttherein; the table being also held tight by means of the same screw. Aplate, Ii, of any convenient size or shape is placed on the material tobe cut, which plate is brought in contact with the center N of shaft B,which holds the work firmly in place. \Vhen such irregular forms asovals, &c., are to be out, the device shown in Fig. 3 is made use of.Herein, the cam I is sectional, being composed of parts a? i. The rim 2'is grooved to take in the parts 2', and is screwed to the frame by meansof machine-screws. Above this cam is an exact counterpart, similarlyconstructed and attached, which two together give the required motion tothe roller 2?. This roller is journaled in a vertical]y movin g slide,'5 which is fitted over an upright stand or guide, i bolted to therevolviughead G. The lever J here connects with the slide 2' by means ofa loop of the former engaging with a pin in the latter. From the leverout the construction is the same as in the former case. The revolvinghead G is cast in such proportions from the center out as to give it asnear] y as possible a balance.

In Fig. 4 is seen a section of the revolving head and slide, the slidebeing in this case underneath the head, whereby the tool moves in linewith the radius, which is necessary in certain kinds of heavy andaccurate work.

The device for feeding the tool down on the work is not shown herein, asany suitable feed may be made use of.

In operation my invention is as follows: The proper adjustment havingbeen given the tool-post for the required size of the form to be cut,and the pin hat'ing been adjusted to give the required shape to thesame, the work is then placed on the table K and the footplate L on thework. The table is then elevated until the plate L is brought tightlyagainst center N. The set-screw M is then tightened, which prevents thetable from shaking in consequence of any loose motion it may have.Motion is then given the driv ingshaft 1), which communicates its motionto the vertical shaft B by the intervention of gearing "l. As the shaftin Figs. 1 and 2 rotates, it carries with it the head G, with all theworking parts belonging and attached to it. As the lever J rotatesaround. the fixed cam, the roller ot' the former passing through thegroove oi the latter, the said lever receives a vibrating motion, whichis communicated to slide H and the tool attached thereto, which gives itthe required motion to form an ellipse. In the case of the sectionalcam, and the device used in connection therewith, as shown in Fig. 3,the rotation of the shaft B, carrying the head, is identical with thatshown in Figs. 1 and 2. In this case the cam is held in the sameposition, but the roller operating it moves in a direct vertical line,giving the face of the cam its full bearing. This roller, beingconnected to the slide 11 gives the an gle-lever J the same motion as inthe former case. When it is desired to change the shape of the figurethe sections may be taken out and interchanged or others placed in theirstead to give the required cutting line.

It will be observed that, although I have herein described a machine forcutting paper and other material, the same may be adopted on ahorizontal machine, such as a lathe, and may also be used for what isknown as ovallathes for turning purposes.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The fixed cam I, in combination with a rotating head, G, carrying theangle-lever J and slide II, all constructed and operating substantiallyas described.

2. A cam, I, made in sections 6 '6, interchangeable with each other andmounted in the grooved rings i i, in the manner sub stantially as andfor the purpose set forth.

3. The guide-stand i and vertically-moving slide i in combination withthe cam I and slide II, as and for the purpose specified.

4. The detachable rims i i, fastened to the frame and holding thesections composing cum I in position, as above described.

BENJ. H. CONNOR. Attcst:

T. VAN KANNEL, LUIS PREIIN.

